A- Jailbreak Iphone 3G

Some steps in this tutorial meant to help you to upgrade from 2.x OS to 3.0 OS, please ignore them if you have already OS 3

1- First u have to download & install iTunes in your Mac

from here (You dont need to do this if you  already have OS 3.0 installed on your IPHONE)

2- Download RedSn0w from here

3- Download OS 3.0.0 (3G): iPhone1,2_3.0_7A341_Restore.ipsw to your computer, make sure to remember where did you save it.

4- Extract the RedSn0w to a new folder (right mouse on the software icon on your machine and then extract)

5- Connect your iPhone to your Mac & run the iTunes (You dont need to do this if you  already have OS 3.0 installed on your IPHONE)

6- Press & hold the Shift Button in your keyboard & press the restore button in the iTunes (You dont need to do this if you  already have OS 3.0 installed on your IPHONE)

7- It will ask u for the file (iPhone1,2_3.0_7A341_Restore.ipsw) just navigate for it & select it (You dont need to do this if you  already have OS 3.0 installed on your IPHONE)

wait for the iTunes to finish installing the new firmware, once its finish

PLEASE READ CAREFULLY SEVERAL TIMES BEFORE YOU START THE PROCESS:

In This stage please shut down ITUNE whenever it tries to lunch

8- run the redsnw0w.app & after it started click on browse

9- select the file (iPhone1,2_3.0_7A341_Restore.ipsw)

10- After it verify the file click next

11- Select (Install Cydia) and then click next

12- Switch off your iPhone & connect it to the PC then click next

Now follow the steps in redsn0w step by step & you have to tack care and by fast, if u missed the steps just go back & try again

13- Hold Down The Power Button for 2 seconds

14- keep holding the power button & hold the home button (together) don’t release the power button for 10 seconds

15- now release the Power button & keep holding the home button for 30 second or until you see a white screen in the iPhone

now iPhone will reboot

Now wait for redsn0w to unlock your iPhone & upload the new ram

redsn0w will tell u that its finish, just wait untill the iPhone restart

(Congratulations you have jail break your iPhone )

B- Unlock Iphone 3GS

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Important

if your iphone is officially unlocked u don’t need to do this step.

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1- Run the Cydia from the Programs Menu

2- Select Manage at the bottom of the menu

3- Press the Sources button in the center

4- Press the Edit button at the top right of the screen

5- Press the Add button at the top left of the screen

6- type http://repo666.ultrasn0w.com/ then press the Add Source button

7- wait until Cydia add the Source then press thr Return to Cydia button

8- Press the Done button at the top right of the screen

9- Press on repo666.ultrasn0w.com from the  sources list

10- Press on ultrsn0w from the list

11- Press the Install button at the top right of the screen

12- Press the Confirm button at the top right of the screen

13- After installation complete press the Return to Cydia button

14- Switch off your iPhone then Switch it on again

After iPhone starts u will see that you have signal, you will be able to make calls & Use any SIM card you want

CONGRATULATION …